Evaluation of the Possible Role of Ixodid Ticks in Natural Tularemia Foci in the Forest-Steppe Zone of European Russia

Abstract We evaluated the stability of perennial legume and cereal grass species in artificial plant communities on permanent anti-erosion watercourses in the agroecosystems of the Belgorod region with active development of linear soil erosion. In the conditions of steppe and forest-steppe zones of the Belgorod region on permanently grassed watercourses in 2017-2019. varieties of perennial leguminous and cereal grasses: ‘Krasnoyaruzhskaya 1’ and ‘Krasnoyaruzhskaya 2’ (Medicago varia), ‘Kazatsky’ (Trifolium pratense), ‘Olshanka’ and ‘Ivica’ (Festuca arundinacea), ‘Streletsky’ and ‘Stepnyak’ (Lolium perenne)) obtained using local genetic material were studied. All varieties showed their resistance in agro-ecosystems with active development of linear erosion in the forest-steppe and steppe zones. Projective cover on watercourses in the steppe zone in all variants of experience was on average 83,4 %, in the forest-steppe zone - 86,3 %. In the third year of the tests on permanently irrigated watercourses in the steppe zone, the share of cereal and legume grass species was quite high and varied from 88 % in the variant M. varia + Onobrychis arenaria to 92 % in the variants M. varia + Bromopsis inermis and O. arenaria. In the forest-steppe zone, the share of cereal and legume grass species varied from 86 % in the variant L. perenne to 94 % in the variant L. perenne + B. inermis.

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The role of variety and forecrop in the population dynamics of Rhizoctonia solani in soil

Siberian Herald of Agricultural Science ◽

10.26898/0370-8799-2021-1-3 ◽

2021 ◽

Vol 51 (1) ◽

pp. 25-32

Author(s):

A. A. Malyuga ◽

N. S. Chulikova

Keyword(s):

Population Dynamics ◽

Rhizoctonia Solani ◽

Growing Season ◽

Steppe Zone ◽

Climatic Conditions ◽

Forest Steppe ◽

The Difference ◽

Two Peaks

Long-term studies (2014–2019) of the population dynamics of the fungus Rhizoctonia solani Küch. were carried out in the soil on the Purple Majesty, Vitelotte and Fioletovy potato varieties and preceding crops (potatoes, oats and tendergreen). The study was carried out in Novosibirsk region in the soil and climatic conditions typical of the forest-steppe zone of Western Siberia. To study the peculiarities of R. solani fungus population dynamics in potato plantations, soil samples were taken from under the plants during the entire growing season. The accumulation of rhizoctonia propagules in the soil was determined using the method of multiple soil pellets. The difference in the amount and rate of accumulation of the fungus R. solani on different varieties, as well as the influence of previous crops on this process, was established. Two peaks of the fungus accumulation were observed on the Purple Majesty variety: the first (48.7 propagules/100 g of soil) – during the full germination period, the second (57.2 propagules/100 g of soil) – at the end of the crop maturation phase. One peak was observed in the population dynamics of the fungus on Vitelotte and Fioletovy varieties, at the end of the ripening period (59.0 and 49.1 propagules/100 g soil, respectively). The smallest amount of R. solani fungus in the soil on average during the growing season was noted on the Fioletovy variety – 33.3 propagules/100 g of soil. In the Purple Majesty and Vitelotte varieties, this figure was 41.5 and 40.4 propagules/100 g of soil, respectively. When potato variety Agata was cultivated as monoculture, there was a rapid and significant accumulation of the fungus R. solani in the soil (from 34.6 to 126.8 propagules/100 g of soil). When this variety was cultivated following tendergreen or oats, the amount of the pathogen varied to a lesser extent (25.1–52.2 and 19.8–41.0 propagules/100 g of soil, respectively). No sharp increases in the number of propagative structures of the phytopathogen in the soil were noted.

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APPROACHES TO DEVELOPING THE MIXTURE PATTERNS FOR MANAGED FORESTS WITH CRIMEAN PINE IN THE FOREST-STEPPE ZONE OF EUROPEAN RUSSIA (VORONEZH OBLAST)

Proceedings of the Karelian Research Centre of the Russian Academy of Sciences ◽

10.17076/eco1473 ◽

2021 ◽

pp. 5

Author(s):

Сергей Валерьевич Левин ◽

Sergey Levin

Keyword(s):

Steppe Zone ◽

European Russia ◽

Voronezh Oblast ◽

Forest Steppe ◽

Managed Forests

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Mg-Rich Authigenic Carbonates in Coastal Facies of the Vtoroe Zasechnoe Lake (Southwest Siberia): First Assessment and Possible Mechanisms of Formation

Minerals ◽

10.3390/min9120763 ◽

2019 ◽

Vol 9 (12) ◽

pp. 763

Author(s):

Andrey Novoselov ◽

Alexandr Konstantinov ◽

Artem Lim ◽

Katja Goetschl ◽

Sergey Loiko ◽

...

Keyword(s):

Steppe Zone ◽

Solute Concentration ◽

Forest Steppe ◽

Bacterial Cells ◽

Authigenic Carbonates ◽

Sedimentary Environments ◽

Exopolymeric Substances ◽

Carbonate Formation ◽

Mechanisms Of Formation

The formation of Mg-rich carbonates in continental lakes throughout the world is highly relevant to irreversible CO2 sequestration and the reconstruction of paleo-sedimentary environments. Here, preliminary results on Mg-rich carbonate formation at the coastal zone of Lake Vtoroe Zasechnoe, representing the Setovskiye group of water bodies located in the forest-steppe zone of Southwest Western Siberia, are reported. The Setovskiye lakes are Cl−–Na+–(SO42−) type, alkaline, and medium or highly saline. The results of microscopic and mineralogical studies of microbialites from shallow coastal waters of Lake Vtoroe Zasechnoe demonstrated that Mg in the studied lake was precipitated in the form of hydrous Mg carbonates, which occur as radially divergent crystals that form clusters in a dumbbell or star shape. It is possible that hydrous Mg carbonate forms due to the mineralization of exopolymeric substances (EPS) around bacterial cells within the algal mats. Therefore, the Vtoroe Zasechnoe Lake represents a rare case of Mg-carbonates formation under contemporary lacustrine conditions. Further research on this, as well as other lakes of Setovskiye group, is needed for a better understanding of the possible role of biomineralization and abiotic mechanisms, such as winter freezing and solute concentration, in the formation of authigenic Mg carbonate in modern aquatic environments.

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Agrotechnical methods ofreducing root rot for cultivating spring wheat in organic farming

E3S Web of Conferences ◽

10.1051/e3sconf/202016101102 ◽

2020 ◽

Vol 161 ◽

pp. 01102

Author(s):

Alfia Razina

Keyword(s):

Spring Wheat ◽

Root Rot ◽

Arable Land ◽

Steppe Zone ◽

Organic Fertilizers ◽

Forest Steppe ◽

New Variety ◽

Wheat Cultivation ◽

New Varieties

Energy-saving technologies of wheat cultivation limit the buffer role of the agrotechnical method in reducing the spread of root rot. This situation calls for using increased volumes of pesticides in order to decrease harvest losses arising from actions of harmful organisms, which does not allow to produce organic food.Considering this, evaluation of the efficiency of agrotechnical methods of cultivating spring wheat aimed at enhancing phytosanitary conditions of crops is very important. The goal of our work was to evaluate the role of predecessors, methods of soil preparation,organic fertilizers, new varieties of spring wheat, and the timing of planting in limiting the spread and reducing the harmfulness of root rot. Our study has been conducted in the forest-steppe zone of Eastern Siberia. We have established that green manure in crop rotationandfallow arable land with introduction of 30 t/ha of organic manure fertilizer with a disc harrow to a depth of 10–12 cmreduce the spread and severity of root rot and increase wheat yields. In the plantings of the new variety of spring wheat Marsianka, the spread of the disease was reliably less,and the yield was higher compared to the control variety Tulunskaya 11. The optimal planting date for the average of two years was May 25, the crops planted then compared to those planted on May 30 were 9.4% less affected by the disease and gave a reliable increase in the harvest of 0.15 tons/ha. Our studies have shown that during production of organic wheat we can limit the spread andharmfulness of root rot withagrotechnical methods.

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Lichens as indicators of forest ecosystems in the Center of European Russia

Forestry Engineering Journal ◽

10.12737/14154 ◽

2015 ◽

Vol 5 (3) ◽

pp. 65-75 ◽

Cited By ~ 3

Author(s):

Мучник ◽

Eugenia Muchnik

Keyword(s):

Indicator Species ◽

Forest Ecosystems ◽

Steppe Zone ◽

European Russia ◽

Forest Steppe ◽

Habitat Conditions ◽

Central Russia

The main are high demands to the habitat conditions (stenotopic or not) and confinedness only to oldgrowth and undisturbed forests and bogs as well as old parks. The lists of indicator species for biologically valuable forest landscapes in the coniferous-broadleaved, broadleaved forests subzones and forest-steppe zone of the Central Russia are given.

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The genesis, classification, and melioration of gleyed podzolic chernozem-like soils in the north of the forest-steppe zone of European Russia

Moscow University Soil Science Bulletin ◽

10.3103/s0147687414020094 ◽

2014 ◽

Vol 69 (2) ◽

pp. 62-68

Author(s):

F. R. Zaidelman ◽

L. V. Stepantsova ◽

A. S. Nikiforova ◽

V. N. Krasin ◽

S. B. Safronov

Keyword(s):

Steppe Zone ◽

European Russia ◽

Forest Steppe ◽

The North

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Growth and ameliorative role of protective plantation in conditions of forest-steppe zone

IOP Conference Series Earth and Environmental Science ◽

10.1088/1755-1315/595/1/012045 ◽

2020 ◽

Vol 595 ◽

pp. 012045

Author(s):

V I Mikhin ◽

V V Taniykevich ◽

E A Mikhina

Keyword(s):

Steppe Zone ◽

Forest Steppe

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Soil invertebrates of the Russian forest-steppes (review of XX-XXI century publications and the revision of the results)

Почвы и окружающая среда ◽

10.31251/pos.v3i4.131 ◽

2021 ◽

Vol 3 (4) ◽

Author(s):

Vyacheslav H. Mordkovich ◽

Ilya I. Lyubechanskii

Keyword(s):

Soil Fauna ◽

West Siberia ◽

Steppe Zone ◽

Forest Steppe ◽

Animal Populations ◽

High Species Richness ◽

Soil Protozoa ◽

The Subject ◽

Russian Forest

The review describes the main stages of the formation and development of soil zoology as a science at the intersection of zoology, ecology and soil science, approximately over a century, i.e. from the beginning of the 1920s until now. The analysis of soil-zoological work carried out in the forest-steppe zone, the subject of which was the fauna and population of soil protozoa, worms, molluscs, microarthropods and larger arthropods, collectively referred to as mesofauna. The forest-steppe was chosen as the topic of the review because it is well-studied and because most of the work on this biome was published in Russian, and little is known abroad (which is not surprising, since more than 80% of the forest-steppe territory is located in Russia). The authors reviewed about 170 the most significant works inventorying soil fauna, analyzing its ecological structure and the functional role of its various components, as well as the studies of the anthropogenic impact on soil animal populations. The works are presented on a territorial basis: the west of the European part of the USSR (Russia), the Volga region and West Siberia. The high species richness and originality of the soil fauna in the forest-steppe, its high resistance to natural and anthropogenic influences were shown. At the end, the review indicates some promising directions for soil fauna research in the Russian forest-steppe.

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ГИГРОТОП И ТРОФОТОП БИОГЕОЦЕНОЗОВ СТЕПНОГО ПРИДНЕПРОВЬЯ КАК ДЕТЕРМИНАНТЫ β-РАЗНООБРАЗИЯ СООБЩЕСТВ ДОЖДЕВЫХ ЧЕРВЕЙ (LUMBRICIDAE)

Biological Bulletin of Bogdan Chmelnitskiy Melitopol State Pedagogical University ◽

10.15421/201651 ◽

2016 ◽

Vol 6 (2) ◽

pp. 188-222 ◽

Cited By ~ 1

Author(s):

A. V. Zhukov ◽

D. B. Shatalin

Keyword(s):

Forest Type ◽

Steppe Zone ◽

Forest Steppe ◽

Ecological Groups ◽

Β Diversity ◽

Α Diversity ◽

Abundance Variation ◽

Abundance And Diversity ◽

Forest Typology

The role of the hygrotope and trophotope of the steppe Pridniprovie biogeoceonosis has been discussed in present article as being determinants of the β-diversity of earthworms (Lumbricidae) communities. Material has been colected to the period 1997-2015. 180 sample polygons have been studied which located in various types of biogeoceonosis. Biogeoceonotic characteristic of the sample polygons have been made on the basis of professor A.L. Belgard forest typology of a steppe zone of Ukraine. Earthworm communities of the steppe Pridniprovie have been established to be presented by 16 species. Hygrotopes, trophotopes and bitope ceonosis features have been shown to be able to explain 72.4 % of a communities’ abundance variation and 73.7 of their % α-diversity by means of second order model. Earthworm communities’ abundance reache their maximum values at a combination of conditions of humidity from hygromesophilous to hygrophilous and conditions of edaphotope trophicity from Dc (linden oakwood) to Dn (elm-ashen oakwood and alder forests). The maximum diversity of earthworm communities has been stated to be characteristic for a combination of mesohygrophilous conditions and a trophicity mode Dc, that there corresponds to forest type a linden oakwood with aegopodium. The coenomorphic structure of the biogeocoenosis is statistically significant predictors of both abundance and α-diversity of earthworm communities. Earthworm communities of marsh monocoenosis, meadow-steppe amphicoenosis and steppe monocoenosis have been found as being characterised by minimum abundance and diversity. Moderate level abundance and diversity are characteristic for meadow-forest amphicoenosis, forest pseudomonocoenosis with elements of transformation to steppe and forest-steppe amphicoenosis. High levels of these indexes are typical for forest monocoenosis. Given other conditions of humidity and edaphotope trophicity being equal in forest monocoenosis abundance and diversity of earthworm communities will be higher than in other biogeocoenosis types. The MDM-analysis (Multinomial Diversity Model) reveals that habitats coenotic features define 12.61 % of all entropy of earthworm communities, hygrotopes – 24.12 %, trophotopes – 12.3 %. The square-law hygrotope member defines 10.93 %, and trophotope – 2.05 %. Hygrotope and trophotope interaction defines 1.53 % of entropy of earthworm communities. Sites (α -diversity) define 36.45 % of entropy. There are other factors which influence a diversity of earthworm communities besides a humidity, trophicity and habitat coenotic features. Steppe Pridniprovie earthworm complexes have been divided into ecological groups on the basis of relation to humidity (hygromorphes) and to edaphotope trophicity (trophocenomorphes). Earthworms hygromorphes are presented by xerophylous (2 species), mesophylous (9 species), hygrophylous (4 species), ultrahygrophylous (1 species). Trophocoenomorphes are presented by oligotrophocoenomorphes (1 species), oligomesotrophocoenomorphes (4 species), mesotrophocoenomorphes (9 species), megatrophocoenomorphes (2 species).

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